Libre Fermi (リブレ・フエルミ) was one of Lugnica's three enemies during the Demi-human War.
Libre was a Snake Human and had a long body with green scales and yellow eyes. He wore a Jiangshi hat and has a black and purple Kararagi uniform with red ribbons.
Regeneration: Libre was able to regenerate lost limbs due to his ancestral blood being from the Serpent Tribe.
Equipment: Libre wielded a sword with both blades at both ends of the hilt.
Poison: Libre was able to poison his targets.
- Libre means free or freedom in Spanish and French.